Malicious PDF — malware analysis report

Static analysis result for SHA-256 db5689612aa9c9f7…

MALICIOUS

PDF

79.5 KB Created: 2021-03-24 09:28:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 55435ad42b2aa7172d2db308655981ee SHA-1: 01a752a92eeb0ab3de9f6f781c98c067eaa89fd5 SHA-256: db5689612aa9c9f722b607cf36ece13537396fc3e299e0cfa8d66a37a4bb3bc2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://baarspo.ru/wix?keyword=download+apk+mobile+legends+for+pc+windows+10 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486363/normal_601338c848f7f.pdfIn PDF document text
    • http://idclick.cash/95318222724hzu7h.pdfIn PDF document text
    • http://boost-store.net/34059562348k59ha.pdfIn PDF document text
    • http://cabinetsly.xyz/774668442100iop1.pdfIn PDF document text
    • http://sigixexizo.sportsontheweb.net/furuwunevudomuzevi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490366/normal_5ff6b1113c009.pdfIn PDF document text
    • http://czecheducation.space/peabody_picture_vocabulary_test_templatekgc41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_6058e330f03c0.pdfIn PDF document text
    • http://pojapusevipuzu.mypressonline.com/bilingual_approach.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499651/normal_6003ee2536574.pdfIn PDF document text
    • http://b2b-servis.ru/kudujarizoposurebofj08x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486751/normal_60356b2a71a89.pdfIn PDF document text
    • http://gatofupimekow.mywebcommunity.org/google_to_ms_word_converter.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387427/normal_5ff1723892bc9.pdfIn PDF document text
    • http://motarojetox.sportsontheweb.net/67150912491.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c7310778-4832-412a-b8f7-979e9aa8a4f7/belisiwifukafulawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e04606b-790b-4d12-9af3-d866af9b00f6/76337930927.pdfIn PDF document text
    • http://nofadokar.rf.gd/66565184997.pdfIn PDF document text
    • http://salekisaju.epizy.com/89984934548.pdfIn PDF document text
    • http://sufazomewugexu.epizy.com/girlfriends_guide_to_divorce_season_5_review.pdfIn PDF document text
    • http://kuxubakelixuzot.atwebpages.com/adobe_premiere_pro_cs6_tutorial_effects.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c21f1e2-d4cb-4fe1-9383-70bed5dde387/72403117337.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFF 5672 bytes
SHA-256: a75a222c9216d1ed8161e2a85da079d233420807ccdd300ac779bc347f5b2649
font_01_sfnt_off0000ff43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF43 10208 bytes
SHA-256: a27a83c7df969081e286b5b1cbb17a0aaa1fe7f1ce7a31a90158af7449b14734
font_02_sfnt_off0001223e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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